Method of driving an element and an hydraulic impactor

(19)

(11)

EP 0 105 854 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.05.1985 Bulletin 1985/19

(43)	Date of publication A2:
	18.04.1984 Bulletin 1984/16

(21)	Application number: 83850257

(22)	Date of filing: 28.09.1983

(84)	Designated Contracting States:
	DE FR GB IT SE

(30)

Priority:

30.09.1982 SE 8205574

(71)	Applicant: Atlas Copco Aktiebolag
	()

(72)	Inventor:
	Lavon, Erik Volmar ()

(54)	Method of driving an element and an hydraulic impactor

(57) In an impactor, e.g. a jack hammer, a liquid column is accelerated through an empty barrel 26 and it impacts on a piston surface (34) of the tool (24), e.g. a chisel.

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